SU1545251A1 - Erasing magnetic head - Google Patents

Abstract

This invention relates to instrumentation engineering, in particular to erasable magnetic heads. The aim of the invention is to increase the heat dissipation from half-hearts. The half-heads of the magnetic head are made up of a set of ferrite parts, between which heat-conducting plates are placed, the side parts of which are in contact with the heat-conducting bus. 1 hp f-ly, 1 ill.

Description

The invention relates to the field of instrumentation, in particular to erasable magnetic heads.

The aim of the invention is to improve the quality of erasure by increasing heat dissipation from half-cores.

The drawing shows the structure of an erasable magnetic head,

The magnetic key-box contains a non-magnetic case 1, in which magnet ferrite half-cores 2 and Cc are placed by a winding 4 magnetically fastened through a working gap 5 "Each of the half-cores 2 and 3 is made in the form of a set of separate ferrite parts 6, between which magnet heat-conducting plates 7 are placed magnetically , the side parts of which are in contact with the heat-conducting tire 8.

Magnetic head in the process of erasing works as follows.

The magnetic tape with residual magnetization, subjected to erasure, is transported with the aid of a tape mechanism with respect to a fixed erasable magnetic head, the latter being in contact with the magnetic tape. At the same time, the working layer of the magnetic tape is affected by a magnetic erase field in the side of the relative gap 5. To create a magnetic erase field, a high-frequency erase current, for example, f 40-120 kHz, is fed into the winding 4 of the magnetic head. The belt magnetic field, repeatedly magnetizing and demagnetizing, each elementary element teaches the working layer of the magnetic tape as it passes past the working 3d era 5, eventually reducing the residual magnetization to zero. In ITC, there is a process of erasing a run of spied information.

When current flows through the current, the erase current is emitting heat. If: the amount of heat produced is equal to the amount of theta applied by the magnetic head, then the TPMI of the magnetic head remains stable and does not increase over time. However, when allocating kolnЈ

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Compiled by B. Sychev. Editor L. Gratilo Tehred L. Oliinyk /

Order 493

Circulation 488

VNIIPI State Committee for Inventions and Discoveries at the State Committee on Science and Technology of the USSR 113035, Moscow, Zh-35, Raushsk nab. 4/5

Proofreader S. Shekchar

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Claims (1)

10 claims An erasing magnetic head comprising a non-magnetic body in which magnetically soft ferrite 15 half-cores are placed with a coil fastened through a working gap gasket, characterized in that, in order to improve the erasing quality by increasing heat removal from 2Q half-cores, heat-conducting magnetically soft plates and a heat-conducting bus are introduced, moreover, the semi-cores are made of separate parts, between which heat-conducting 25 magnetically soft plates are placed, which on the working surface are made repeating il half-core and on side portions formed protruding portions and are associated with teplo50 wire bus.